| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| ThaÏS | - | Ancient Greek | ||
| Thais | - | Ancient Greek | ||
| Thales | - | Ancient Greek | ||
| Thancmar | - | Ancient Germanic | ||
| Thankarat | - | Ancient Germanic | ||
| Themistocles | - | Ancient Greek (Latinized) | ||
| Themistokles | - | Ancient Greek | ||
| Theobald | THEE-ə-bawld (English) | English (Rare), Ancient Germanic | ||
| Theocritus | - | Ancient Greek (Latinized) | ||
| Theoderich | - | Ancient Germanic | ||
| Theodoar | - | Ancient Germanic | ||
| Theodoard | - | Ancient Germanic | ||
| Theodora | thee-ə-DAWR-ə (English) | English, Greek, Ancient Greek | ||
| Theodoricus | - | Ancient Germanic (Latinized) | ||
| Theodoros | - | Greek, Ancient Greek |